everest% cc scan2.c
everest% 

everest% a.out
Enter "abc" followed by an integer: abc 34
r = 1, a = 34
Enter your name and age: Richard 31
r = 2, str = "Richard", a = 31
everest% 

everest% a.out
Enter "abc" followed by an integer: 34
r = 0, a = 0
Enter your name and age: Richard 31
r = 1, str = "34", a = 0
everest% 

everest% a.out
Enter "abc" followed by an integer: abc 34
r = 1, a = 34
Enter your name and age: Richard Chang 31
r = 1, str = "Richard", a = 34
everest% 

everest% a.out
Enter "abc" followed by an integer: xyz 34
r = 0, a = 0
Enter your name and age: r = 2, str = "xyz", a = 34
everest%